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Weight Puzzles

Sample Puzzles

Find below couple of weights and balance scale related puzzle questions. We are also mentioning the difficult level as per our perception. Our opinion may differ from yours.

Weight Puzzle Number 1

Here is a puzzle question of average (2/5; 5/5 is most difficult) difficulty level -

Among 12 identical looking golf balls there is one that is defective in weight. It is either heavier or lighter than the standard one. You have a balance Scale. You can only weigh 3 times to find out which one is defective and whether it is heavier or lighter.

Explain how will you be able to find the defective ball.

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Weight Puzzle Number 2 –

How many pre-measured weights do you need if you have got a balance scale in order to measure the weight of an object in the right pan of the balance scale. The weight of the object could be any exact number of Kilograms up to at least 120 Kg? Please also mention the weight (in Kgs) of the weights.

Leave your answer below by writing in the comment area!

How many pre-measured weights (for the left pan of your balance scale) do you need in order to measure the weight of an object in the right pan of the balance scale (you should be able to measure any exact number of ounces up to at least 120 ounces)?

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Related posts:

  1. You have 12 coins, one of which is fake.
  2. You have a pile of 24 coins
  3. Squaring Puzzles

This entry was posted on Tuesday, February 2nd, 2010 at 17:30 and is filed under Puzzles. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

5 Responses to “Weight Puzzles”

  1. if the condition is that we can weigh each ball three times then:-

    1)divide the balls in 6-6 and wieigh
    2)one with bigger wgt is taken and divided into 3-3
    3)if one is bigger and other is smaller then take the bigger 3 balls chunk and weigh 1-1 …if both are equal the left one is biiger one and the defctv one AND if one is bigger than the othr than the bigger one is defective and bigger.
    4)but if on 3-3 weighng the balance show that they are equal then take the smaller 6 chunk as was in step 1 and then divide it into 3-3 ..weigh them ……choose the smaller 3 chunk and weigh 1-1….if equal then the left one i s smaaler and defctv …if one is gr8ter than other then smaler one is smaller and defctv:)

    BUT IF CONDITION IS TO USE THE BALANCE ONLY THRICE THEN LOOK 4 OTHER ANS

  2. divide 12 into 3 groups of 4 each
    put 4balls on each side
    1st if both equal then keep 2balls one side out of these 8 balls and 2 balls from remaining 4 balls.
    If both equal then put 1 ball from these 4balls and 1 ball from remaining 2balls.if both equal then remaining ball will b defective.If both are not equal then ball kept from remaining 2 will b defective.
    If group of 4 balls kept is not equal then leave 3rd group and take any 1 group from these 2 and keep 2balls on each side if both equal then defective will b from 2nd group remaining .

  3. 7 weights are required for measuring upto 120kgs.
    1,2,4,8,16,32,64

  4. 2.) 5 weights are required: 1,3,9,27 and 81

  5. for the first puzzle:12 balls
    divide the balls into 2 patrs(6)(6)
    place tem in two panels next..the one which is weighing heavier take dat and divide dose in into 2 equal parts (3)(3)
    nw repaet the same ting .nw which is weighing heavier take dose 3 balls and now
    dis is d 3rd measurment:
    nw palce 1_1 in each panel
    nw if dey are equal den d left is d ball we r searching for..else any of dose 2..

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